Authorities forced a Colombian news station off the air on account of its coverage of violence around anti-government protests, and any move to control Twitter would seemingly be another tactic to stifle word of events spreading across the country. (Images posted from Venezuela are visible outside of the country.)

Screenshots from Twitter users in the country appear to show that images — including profile photos — are failing to load for many. That could be down to a restriction on telecom companies and their data services, although there remains the possibility that other factors are at play.